Honeywell Series A - Behavior of the Block Offnet and Device Offnet System alarms in various operational scenarios

5. Configuration
5.7. Block Offnet Diagnostic Alarm
236 Experion PKS Series A Fieldbus Interface Module User's Guide R400
Honeywell July 2010
Communication loss
scenario
Behavior of Block Offnet Alarm
Behavior of Device Offnet System
Alarm
Summary Display. Summary Display.
Behavior of the Block Offnet and Device Offnet System alarms in various
opera
tional scenarios
The following table lists the behavior of the Block Offnet and Device Offnet System
alarms in the various operational scenarios. These behaviors are also dependent on
whether the devices are online or off the network.
Scenario Behavior of Block Offnet Alarm
Behavior of Device Offnet System
Alarm
Inactivating a
Fieldbus Link when
the device is online.
A Block Offnet Alarm is not
reported for each loaded function
block.
A high-priority Device Offnet
System Alarm is reported for the
device.
Inactivating a
Fieldbus Link when
the device is off the
network.
Previously reported Block Offnet
Alarms changes from “Active” to
“Disabled” in the Alarm Summary.
A high-priority Device Offnet
System Alarm is reported for the
device.
Activating a Fieldbus
Link.
Previously reported Offnet Alarms
changes to “Disabled” when the
Link is inactivated in the Alarm
Summary. When activated, these
alarms are regenerated to
indicate the current condition of
the alarm.
If the Offnet condition does not
exist, the previously reported
alarms remain in the Alarm
Summary as “Disabled”.
Previously reported Offnet Alarms
changes to “Disabled” when the
Link is inactivated in the Alarm
Summary. When activated, these
alarms are regenerated to indicate
the current condition of the alarm.
If the Offnet condition does not
exist, the previously reported
alarms remain in the Alarm
Summary as “Disabled”.
Activating or
Inactivating a CM
containing a FF
function block.
Changing the EXECSTATE
parameter value has no effect on
the alarms reported by Fieldbus
blocks.
Changing the EXECSTATE
parameter value has no effect on
the alarms reported by Fieldbus
blocks.
Changing the state Changing the state of a CEE Changing the state of a CEE